I purchased a Rolson 49CC dirt bike for my son. It ran great for a few days then we hit a snag. When the motor is engaged, the clutch on the motor engages and theback sprocket spins but will not spin the wheel (It becomes a free sprocket and will not move the bike). I cannot find a site for Rolson on the internet to find out how to repair or perhaps replace this back wheel. How are these taken apart and repaired or do you know of a site where I can order parts??

Al